MCQ practice · SSC Biology Board questions · Chapter 12: Heredity in Organisms and Biological Evolution
Purines are-
Think it through first, then pick an option.
- a Nitrogen bases
- b Histone proteins
- c Phosphate bases
- d Glucose
Answer and explanation
Correct answer: a Nitrogen bases
Purines are a kind of nitrogen base, such as adenine and guanine.
Why the other options are wrong
- b Histone proteins: Histone proteins are chromosome proteins, not purines.
- c Phosphate bases: There is no phosphate base; the phosphate is a separate component of the nucleotide.
- d Glucose: Glucose is a sugar, not a purine. The right answer is Nitrogen bases.
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